Boring-bar puppet



(No Model.) 2 Sheets-Sheet 1.

F. W. TAYLOR.

BQRING BAR PUPPBT. No. 428,703. Patented Maly Z7, 1890.

ma cams paens co., wow-mnu., msmmmu, u. c.

(No Model.) e 2 Sheets-Sheet 2.

F. W. TAYLOR.

BORING BARl PUPPET.

No. 428,703. Patented May 27, 1890.

wnrNE'sSES:

me News paens co., Nom-uwe., msxmc'raw, b. c.

UNITED STATES PATENT OFFICE.v

FREDERICK W. TAYLOR., OF PHILADELPHIA, PENNSYLVANIA.

BORING-BAR PUPPET.

SPECIFICATION forming part of LettersV Patent No. 428,703, dated May 27, 1890.

(No model.)

.To all whom it may concern.-

Be it known that I, FREDERICK W. TAYLOR, of the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Boring-Bar Puppets, of which thefollowing is a specification.

My invention relates especially to that class of puppets or tail-stocks which are used upon lathes of considerable size to advance a boring-bar into the axis of a piece of revolving work, but it being also well adapted as a puppet for use in conjunction with lathecarriages, planer cross-heads, upright drills, 85o., and for advancing revolving as well as rectilinearly-reciprocating boring-bars into radial and other holes, it is hereinafter particularly described in connection with the adjustable tail-stock of a power-lathe as illustrative rather than as limitative of its use and scope.

The chief object of my present invention is in advancing a boring-bar lby a hydraulicram system, to do so with a compact mechanism disposed radially and systematically about the bar, the Whole located so as to be as close to the cutters of the bar or its support as is compatible with the mechanisms range of action, and preferably constituted of concentrically-enveloping elements, further objects being to combine with a hyraulic boring-bar mechanism such further mechanism as may either prohibit or control the rate of advance which the thrusts of the hydraulic ram or rams may tend to deliver upon the boring-bar, (in which connection I hereby refer for further information as to this method of feeding when the advancing and restraining forces are applied out of a common alignment to my United States patent, No. 289,121, dated July 3l, 1888;) also, to contrive -the mechanism so that by taking one or more fresh holds upon the bar its advance may be continued through a range of action greater than that of the workingstroke of the hydraulic ram or rams, together With such other novel features as I distinguish in the following description and claims. For reference now being had to the laccompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts throughout the figures, they will be found to illustrat-e my invention,.as follows, to wit:

Figure 1 is a side elevation of a power-lathe equipped Awith a back-rest and my improved boring-bar-puppet mechanism inthe act of feeding a reciprocating boring-bar into the axis of a piece of chucked work; Fig. 2, a longitudinal median cross-section of the puppet mechanism shown in Fig. 1, the foot or supporting part being broken away for the sake of economy of space; Figs. 3 and 4, front and rear views, respectively, of the puppethead shown in the above figures, the line Fig. 1, denoting that of the cross-section of Fig. 3, and the line y y that on which th'esection of Fig. 4 was made; Figs. LA and 4B, rear and plan views of a modification upon a dupleX arrangement, the scale being considerably greater in Fig. 4A; Figs' and 6, asideelevation and plan view, respectively, of a modification of my improved puppet applicable for rotating boring bar or drill; Fig. 5A, an end- Wise view, partially in section, looking'outward t0 the rear, as indicated in 'offset arrow ends of the broken line x Qc o f the structure shown in Fig. 5; Fig. 5B, a detail of afragment on an enlarged scale, the portion given sectionally being indicated by the broken sectional liney y of Fig. Figs. 7 and 8, aside elevation and r'ear end view of a further modication.

In the figures, A represents the live-head of a power-lathe, of which the shears C are'fashioned with ordinary prismatic guide-rails c c', Figs. 1 and 3, and carry a back-rest or boring-collar D. The work E, carried by the chuck a., finding a concentric bearing in the collar d of this rest D, presents its free or muzzle end e to the boring-bar F. H Now this bar F enveloped in a concentric sleeve,the bushing II (see Figs. 2 and el.) issues from the muzzle or front end of .the tubular puppetslide G, the whole lying concentrically disposed to and in the prolongation of 'the axis of the mandrel d', and the slide G nding' au abutment for its muzzle g2 against the adj oin- ICO puppet-head housing B and their packing glands I I, (see Figs. 2 and 5,) adjustably bolted to the front and rear of said housing B, (by the bolts yz' t,) fitting closely about the front and reduced tail G and G2 of this slide G, serve to keep it and the parts it carries not only in its aforesaid alignment with great steadiness and accuracy, but also to allow it to reciprocate longitudinally with tight joints in the necks aforesaid, the length of stroke being approximately the length of the internal cylinder-cavity B of the housing aforesaid, and the ange or annular surface G between the front and rear extensions of the slide G forming in the preferred enveloping single-cylinder sort (illustrated in Figs. l to 4, inclusive) the piston area (Z, upon which water or other equivalent liquid when introduced under pressure by suitable supply and escape conduits--sueh as the pipes b 712, screwed into holes, as Y), Fig. l, communicating with the cylinder-cavity Bacts to urge the slide G as a ram outward from the body of B toward the work E. rlhus with the puppet slide-bar G, by the pressure transmitted from its muzzle as a ram through the collar H and chuck-screws g g g, (or their equivalent,) the bar F and the tubular bushing ll also receive a tendency to similarly advance toward the work, and this tendency to advance under the hydraulic pressure in the endwise-slidin g parts of the above-described device (illustrated in Figs. l to 4, inclusive) the screw-threaded tail 112 of the bushing Il and its nut L either prohibits or controls.

It is evident that the bushing Il maybe made integral with and part of the slide-bar G, instead of being detachable therefrom, in which case the screw-threaded tail H2 of the bushing ll would be part of the slide-bar G. Said threaded tail H2 of the bushing l I, (see Fig. 1,) while splined, so as to prevent rotary motion by the slot h (fashionedintegral therein) and the key L, seated in the collar J', (see Figs. l and 4,) otherwise passes freely end wise through the collar, which in turn, being fashioned integral with the casin g J, is secured together with it (J) by the latter being abutted and fixed, as by screws j', to the annular shouldery of the housing B, (see j, Fig. 1,) whereby the whole, forminga concentric cap to the rear of stutiing-box I', reacts to the strains which the advancing tendency of the ram aforesaid transmits through the various sliding parts to the nut L, and it (L) when stationary delivers these strains through J J to the said shoulderj, and thereby the housing l on receipt absorbs them, while, on the other hand, any unscrewing or running down of the nut L toward the free end h3, Fig. 2,01? the tail 112, naturally acting to release Il, permits the tendency aforesaid to develop into an actual advance of the slide-bar G, and with it H H', g g g, and F are fed forward toward the work. New these conditions of the nut L are conveniently regulated by me as follows: The screw II (being slotted lengthwise, as above described and shown at 7L, Fig. 1,) carries the nut L, when banked against the rear of the abutment-collar J, with the worm-teeth that are eut upon that nuts concave periphery in gear with the threads of the tangent screw la, journaled transversely to the axis of said nut L in a suitable position by the bracketbearings K K, and thus the worm-screws spindie 7s affords by its fixed cranked hand-wheel 7,32 a convenient means for manually actuating this as a releasing mechanism, as well as an automatic hold-fast preventive ol' its nuts rotation it' left by the operator at any desired adjustment along the threaded portion H2 of the sliding bushing Il. Moreover, in eases where means for forcibly exhausting the liquid introduced into the cavity 3 do not exist, the nut L and screw H2 are in themselves readily available as a device for withdrawing the protruded portions of the sliding members G ll and whatever bar F, dsc., they may have ehueked to carry; but of course to this end the fluid in the eylinder-cavity l must not only be released from pressure, but allowed to escape, which can be accomplished by the conduit b2. Otherwise by exhausting the fluid, &e., from the cavity 3 the pressure of the air upon the muzzle area of the ram-plunger or piston-rod maybe called on to act to force the sliding parts home after a protrusion, the nut L being then merely run along the tail lf2 at a proper pace to permit of the colisequent retreat.

The slide-bar G may be, as is often thccase in ordinary lathe-puppets, prismatic instead of cylindrical, (see GW", Figs. 7 and 8,) wherein it is illustrated as of square cross-section, and it then maybe equipped with a longitudinally-disposed rack F2", and a spur and pinion wheel train F3" F1 F2, rotatably journaled in a suitable housing formed by an extension Bsof the main puppet-housing l, (see Fig. 7,) the crank-handle of which train fixed to the spur-wheel shaft f8, Fig. 8, to which it is offset as a fragment, serving to control the slide-barili releasing, restraining, or retreating the mechanism instead of the preferred screw and the nut-releasing device shownin Figs. 1,2, and 4; but should this releasing method of feeding not be desirable in eertaineases, it is within the purview of my `present invention notte employ one, as, say, by using, lrst, such a device as that illustrated in Fig. l, d ivested of the abutment tail-case J, together with all the holdback mechanismsuch as the worm-screw 7.2, the nut L, andthe screw ll2-to which end the removal of the boltsj and nut L in the instance under consideration sullices, and that being done the reciprocations of the puppet-slide G are to be citected, whether for actual feeding or for mere retreating, tbc., by the pressing into or exhausting from it of the liquids within the cylinder-cavity ll by way of the conduits b b; second, such a device as that illustrated in Figs. at i, wherein the mechanism, apart from certain structural -1nodifications not IOO `ism, for, in addition to the above concentric enveloping forms, Figs. 41 411 show a modification, consisting of a duplex-ram system, to wit: the right and left similar and symmetrical ram-cylinders BET' Bbolted upon, lying parallel to, and at equal distances' from the central puppet slide-bar F G, which, passing througha cylindrical guide-chamber B100, (as an ordinary lathe-puppets slide-bar does,) is here adapted to be actuated endwise by the piston-plungers G T15, which, issuing from the aforesaid cylinders, bear upon diametric ally-opposite-portions of the annular collar H10, Fig. 7, and that collar being mounted, preferably, so as to be longitudinally adjustable endwise along the screw P of the slidebar 'F G, it serves to transmit the thrusts of Athese rams evenly and simultaneously to it.

Moreover, as the bar F G in this case carries the cutter p, keyed by wedge p', in a suitable transverse slot near its outer end, it very clearly illustrates the close association which my invention permits between the tool, the guided portion of the now integral boring slide-bar, and the forcing agent or ralnsystem, and this despite the fact that the aforesaid ram-cylinders B- are also in this instance shown as separable parts bolted to the sides of B.

So Figs. 7 and 8 display a still further modification without departure from the typicalv radial disposition, for, in addition toa squarei slide-bar G100 an d its rack and pinion releasing gear, as above identified, three cylinders B` having a similar conical shank F10, fits and chucks itself in a well-understood manner. The conduits b 50 are here, as more specifically shown in Fig. 2, presumably in connection with the several ram-cylinders respective cavities, (indicated by broken outlines and their plunger-rams providedwith proper pistons, as gt, for receiving the pressure both front and rear, are divested of rearward extensions, for the slide-bar G100 is now guided independently of them by its envelope B200 aforesaid.

Y In Figs. 5, 6, 5^, and 511 I show certain modifications of the structure shown in Figs. l to 4, which adapt it to advance a boringbar not only with a rectilinear reciprocation, but also tov drive it with a rotary motion as well, the feed mechanism being, however, of the preferred screw-releasin g sort, for here, with the exception of the omission of the bushing H and the addition of cone-bearing F', Fig. 6, formed integral upon that portion of the bar where it emerges from the slide-bars correspondin gly bell-sh aped or conic muzzle-cav ity G3, and said conic cavity, lthe sliding members are correspondingly formed, located, and interguided in the cavity and glandular orices of the puppet-housing to those shown and described in Figs. 1 to 4, inclusive, save that/the puppet-housing B has, for the purpose of this modification, its rear part extended into a saddle-back extension B0, provided with a consecutively-disposed series of pillars 1910 T920 b00,having concentric cylin'dricalbearingsf]c2 f3, Figs. 5 and 6, through the first two of which the longitudinally-slotted tail F2 of the boring-bar F passes, its rear end F3 being connected to the iianged head h100, Fig. 511,'of the separate concentric releasing-screw H100 by being screwed at F1 to the reducing-cap F10, whose annular flange F11, embracing the neck of the screw H100, prevents its escape from the chamber f 10, yet allows the bar to revolve when actuated, as hereinafter described, despite the fact that the spline-finger h2, bolted to the housing-pillar b3() of the head-extension B0, having its tip in the longitudinal slot 77,3 of that screw, (see Figs. 5, 5^, and 513,) prevents said screw from rotating at all, just as, on the other hand, the worm-threads of the nut L, registering with the screw H100 and carried fixed to the, in this case, tubular spindle 4Il of said releasing-nut, may cause that screw to move endwise either to or away from the cylinder should that worm-nut be turned. Now this turning ofthe nut L, I have contrived in this case to depend upon mechanical connections with the mechanism Vnow about to be described for giving the aforesaid rotary motion to the bar, byy which the feed motion becomes automatic, kas well as of the preferred releasing system sort--to wit, for the nutL, being here again provided with a worm-wheel and tangent screw, is substantially as shown in'Figs. l to 4 above, save only that for convenience in association the said tangent screw is placed vertical instead of longitudinal, and its shaft 7e', Fig. 5^, beingy equipped with a longitudinally-splined -miter-gear 7t10, carriesyit normally just above where that shaft finds a step-bearing in the lower of the elbowdorackets 550, a suiiicient length of said spindle being preserved between said gear and the body of the tangent screw k (see Fig. 5A) to permit of said gears being slid lengthwise along it, for if at any time it should be desired to put the automatic feed mechanism out of gear it then may be done by lifting the gear 7510 aforesaid out of range of its norm ally-intermeshing miter-gear N, which latter is fixed upon the end of the counter-shaftN,andthenceN,passingthrough bearings N20 N30, Fig. G, fashioned from the side body ofthe head-housings extension B0, spans IOO IIO

the .gap between the pillars U10 b10`and inds'a low the parts F Hwn aforesaid carries, by means of their splined eyes engaging in the slot N, (see Fig. 5,) the lengthwise-slidable chan ge-ofspeed spur-wheels n n', which wheels, with the annularly-grooved slider-drum O, being xed together or preferably formed integral, are controlled by the forked slider-rod n3, which, by a branch als, Fig. G, passing within and across the extension B9, is operatively connected to slotted apertures bg by the col lar a5 and thumb-nut bindingscrew at n",- also, between the housing-bearings within Z110 b2" there is splined against radial slipping and fitted for mutual lengthwise sliding upon the bar F the sleeve M, (see Fig. 5, wherein the dotted outline M is the spline fixed to said sleeves eye, and F2 the lengthwise-slotted seat in F,witl1 which the same engage,) and fashioned integral with this sleeve M are two pinion-wheels m mi', adapted to engage and intermesh, respectively, with the aforesaid spurgcars yn a', according as one or the other of the latter is brought into alignment with its mate by the manipulation of the slide-rod n3, and there anchored by the nut at n.4, the slot 11S, Fig. G, indicating by its length the range of action that is approximately necessary for this change of the driving-gear train. Finally, fixed to the shaft Naud adjoining the gear a the 1nitergear N2 derives circular motion from the fellow interni eshin g miter-gear V, to which such motion is in turn transmitted by the driving-shaft t, journaled transversely of the general structure in the lower portions of the pillar bm, as indicated in the dotted bearings t t', Fig. G, and so the same, preferably steadied by the outside hanger-bearing t2, carries the fast and loose belt-wheels T T', by means of which the whole is operatively connected with or cut off at will from any suitable prime mover, for, as to the operation of this rotative automatically-feeding variety, it is only necessary that motive power be supplied the belt-wheel T in the usual way. Then that motion being transmitted by its shaft Fig. G, the ruiter-gears V N2 deliver it to the counter-shaft N, and it, either by N m or n n, according to the position which the sliderbar In places the slide-block O along the shaft N, serves to drive with correspondingly-n1odified speeds the sleeve M, which by its spline M not only allows the boring-bar F to slide endwise through the bearings blo U20, but also drives it therein with a corresponding rotary motion, so that as the cone F5 forms an abutment as well as the terminal journal of the rota-ry bar F, against which the muzzle G3 of the ram-plunger slide-bar G bears, Fig. G, it is thereby urged forward under the pressure of the liquid introduced through the conduit b, and bar F is thus again, in addition to its newly-acquired rotary motion, subjected to a forward tendency similar to that which is received in the form illustrated in Figs. l to et; but here the abutment b3, Fig. (i, receiving the thrusts of the nut L, serves, through the medium of the cap F10 and intermediate holdback or releasingscrewIIlLto eitherabsolutely restrain that tendency and forbid the advance or to control it. The latter action takes effect at such time as the sliding miter-gear 7cm is dropped into gear with N N', and thereby also derives motion from the shaft N, and so it, by means of the tangent screw and worm 7; Z, rotates that nut in its sleeve-bearing L. That accomplished, the screw IIm0 issues from the nut L, for, the spline-finger h2 preventing that screws rotation, the endwise pull delivered to its head 71.10U by the rotating cap F10 takes effect, and the spline finding no opposition in the slot to endwise sliding, the tendency is suffered to develop into an outward advance or feed of the bar, its rate of advance depending upon the pitch and rapidity of rotation oi' the screw and nut L, which are of course to be fashioned according to t-he exigencies of constructive detail.

It may also be noted that the binding-screw s (shown in Fig. 5^) serves to hold the mitergear km in or out of range of its fellow N', as desired, and also that the slide-bar G is here also of the hollow7 iype-that is, an open tube from end to end.

In conclusion, as to the operation of the several forms preceding Figs. 5 and (l has been incidentally incorporated with the preceding description of their parts and mode of association, it need only be added here by way of supplement that while I prefer to employ my releasing feed mechanism in conjunction with the symmetrically and radially surrounding ram or rams of my improved boring-bar puppet mechanism, I do not wish to be thereby understood as solely limiting myself thereto, for, as above pointed out, whether the advance be merely a tendency, either absolutely restrained or automatically controlled and fed bythe operation of parts such as are set forth in the descriptions of the releasing mechanism to Figs. 5 and G above, or whether that tendency be delivered immediately as developed to the bar, wherebyit becomes both the feeding and advancing agency in one, all the several modifications hereinbefore described embody in common certain characteristics which, apart from that of the releasing mechanism, are novel to boring-bar puppets.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The combination, with a reciprocative puppet slide-bar and its puppet-housing, of a concentric and radially-surrounding hydraulic ram operative as a slide-bar-advancing mechanism, substantially as and for the purposes hereinbefore described.

2. The combination, with the puppet-housing and interguided reciprocating slide-bar, the latter provided with suitable means for carrying the shank of a boring-bar or equivalent instrument, of two or more symmetrical hydraulic rams disposed at equal angular di- IOO IIO

ITS

vergence about said slide-bar and operative to advance the same, substantially as and for the purposes hereinbefore described.

3. The combinatiomwith the puppet-housing and hollow interguided reciprocative slide-bar, the latter provided with suitable means for carrying a boring-bar or equivalent instrument, of a hydraulic ram or rams radially disposed in a symmetrical arrangement about said slide-bar as well as operative to advance the same, substantially as and for the purposes hereinbefore described.

4. The combination, with a puppet-housing having a suitable cylinder-cavity and conduits leading thereto, of a reciprocative puppet slide-bar provided With means for,carry Ving a boring-bar, said bar and ram-plunger fitted in said cylindrical cavity of said housing and operative to advance said slide-bay, the Whole being radially and symmetrically disposed, substantially as and and for the purposes hereinbefore described.

5. The combination, with a puppet-housing having a suitable cylinder-cavity and conduits leading thereto, of a reciprocating puppet slide-bar, and a ram-plunger formed integral and itted to said cylinder so as to advance under hydraulic pressure, the whole being radially and symmetrically disposed, substantially as and for the purposes hereinbefore described.

(i. The combination, With a hollow reciprocative slide-bar provided with a suitableabutment-bearing, as F5, and a boring-bar rotatably mounted therein, of a puppet-housing wherein said slide-bar may reciprocate endwise, mechanism for driving said boring-bar with a rotary motion, and a hydraulic ram or rams symmetrically andradially disposed to said slide-bar as Well as operative to advance the same, substantially as and for the purposes hereinbefore described.

7. The combination, with the puppet-housing and interguided reciprocative slide-bar adapted to carryaborin g-bar or equivalent in- CTI stru ment, of a radially and symmetrically disposed slide -baradvancing mechanism consisting of a hydraulic ram or rams, and a holdback screw and nut or equivalent releasing mechanism operative to prohibit or control the tendency of said advancing mechanism, substantially as and for the purposes hereinbefore described.

8. The combination, with the puppet-housing and hollow interguided reciprocative slide'- bar provided with a suitable abutment-bearing, as F5, ot' a boring-bar rotatably mounted therein, mechanism operative for driving said boring-bar with. a rotary motion, symmetrically and radially disposed advancing' mechanism consisting of a hydraulic ram or rams,

and a holdback screw and nut or equivalent releasing` mechanism operative to prohibit or control the tendencyot said advancing mechauism to urge the slide-bar forward, substantially as and for the purposes hereinbefore described.

9. The combination, with the puppet-housingand hollowinterguidedreciprocative slidebar provided with a suitable boring-bar abutment-bearing, as F5, of a boring-bar or equivalent instrument rotatably mounted therein, mechanism operative for driving said instrument with a rotary motion, symmetrically and radially disposed advancing mechanism consisting of a hydraulic ram or rams, a holdback screw and nut or equivalent releasing mechanism operative to prohibit or control the tendency of said advancing mechanism in urging the slide-bar forward, and mechanism, as the worm and tangent screw, operatively connecting said rotary driving mechanism with said releasing mechanism so as to automatically control the rate of said release, substantially as and for thc purposes hereinbefore described.

FREDERICK W. TAYLOR. Witnesses:

LEWIS R. DICK, JOSHUA MATLACK, Jr. 

